This name is a synonym of Atriplex powellii var. minuticarpa (Stutz & G.L.Chu) S.L.Welsh.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Madroño 40: 161 1993.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:305936-2.
This name was in version 1 of The Plant List, record kew-2665508, and has not been changed.